Thanks for all the suggestions.

1. I didn't do the polarity wrong because it reads 2 ohms ... and it's a dual 4 sub.
2. I am hoping the RCAs are garbage ... as the amp looks to be running nice AND it "WAS" working in my Beretta (different HU and RCAs) perfectly ... albiet not extremely loud.

Thanks tho, I am getting his car for a few hours on Tuesday.

 

^ pssst, duude, the VC will read the same resistance regardless of what way you test it
It won't know if it is hooked up backwards.

Easy test - hit the sub wire with a battery off your cordless drill and see if the woofer jumps or just sort of 'twitches'.